Which side of an obliquely swept wing will create more lift? By "obliquely swept wing" I mean this:

[![enter image description here][1]][1]

[This](https://aviation.stackexchange.com/q/107005/70478) answer states that the overall lift will decrease due to an effective decrease in wing area. That answer was focusing on an aircraft in a sideslip, but I'm fairly sure the overall effect will be the same as in this picture.
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I read through some of [this](https://www.desktop.aero/library/ofwwhitepaper.pdf) paper, and in section 2.2.2 (AKA page 16) it says:
>A well-known effect of wing sweep is the variation of induced downwash along the span from the trailing
wake that produces an additional lift distribution characterized by increased loading on the aft wing and
reduced additional lift on the forward wing. For a wing with no twist or bend, this results in a significant
rolling moment, tending to roll the forward wing downward.

Note: The use of the term "wing sweep" in this excerpt is being used to describe a scenario like the picture above. Not what you would usually think of wing sweep as.

It states that the forward wing will tend to roll downward (so the right wing in the picture above would roll downwards). Why is this?

I can't see anything that would differentiate the aft wing vs. the forward wing in terms of aerodynamics, so what am I missing?


  [1]: https://i.sstatic.net/yraatPl0.jpg